The bottom bracket is solid and durable with a long service life, corrosion and rust protection.
Central bracket with square pin for 68 mm bicycle floor. Please use the BB tool to install and replace the bottom bracket for safety reasons.
Fine workmanship, easy to use. small dimensional error, precise 2-bearing thread design, which allows a better connection with the bicycle arm.
Integrated structure, no unusual noise, no gaps, to prevent the assembly from getting stuck, safe for use.